Electric time-switch.



.No. 703,I28. Patented luneI 24,' |902.

c. F. HEATH. ELECTRIC TIME SWITCH.

(.'A'ppliczxtipn filed Mur. 11, 1902.) (Nollodel.) 2 Sheets-Sheet I.

Patented June 24, |902.

C. F. HEATH.

ELECTRIC TIME SWITCH (Application led Mar. 11, 120:2.) (No Model.) 2 Sheets-Sheet 2.

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UNITED STATES PATENT Fries.

CLARENCE E. HEATH, OE PROVIDENCE, RHODE ISLAND, ASSIGNOR, SY DIRECT AND MESNE ASSIGNMENTS, TO CHARLES S. ORR AND JOHN IV. BOND, OF PROVIDENCE, RHODE ISLAND.

ELEC-TRS THW SWlTCll.

SPECIFICATION forming part of Letters Patent No. 703,128, dated June 24, 1902.

Application iilefl March 1l, 1.902. Serial No. 97,753. (No morlelix To @ZZ whom ib mf//Z/ cm1/06PM: lar and normally projects beyond the face ot Be it known that I, CLARENCE F. HEATH, a wheel Q. Around the rim of the wheel, slightly citizen of the United States, residing at Proviin advance of each plunger, is a projection l5, 55 dence, in the county of Providence and State adapted to contact during rotation with the 5 of Rhode Island, have invented certain new lever-cam 16.

and useful Improvements in Time Switch The shaft S is actuated by the tension olE a Mechanisms, of which the 'followingis a speciclock-spring housed in barrel 17 and wound fication. upon the key-shaft 1S, one of whose extremi- 6o Myinvention relates to clock-controlled ap ties is carried Vby the frame l and the other 1o paratus designed 'to open and close electricby the support l5). Upon shaft 1S is mountlight or other circuits at a predetermined ed a gear 20, meshing with a gear 2l upon the time, and has for its primary objects simmain shaft. The shaft IS is periodically plicity and accuracy. wound by means of a key, which operation is 65 To these ends my invention consists in the facilitated by the usual pawl-and-ratchet novel construction and combination of parts mechanism (il, adjacent the gear 20.

hereinafter described, and illustrated in thc Iivoted to an arm 22 on the frame l by a accompanying drawings, whereinstud 23 is a lever-arm 24, carrying near its Figure 1 is a front view of my mechanism free end a downwardly-projecting cam IG, 7o with the dial-plate removed; Fig. 2, a side which hasaconcave lower edge and overlaps 2o elevation of the entire mechanism; Fig. 3, an a portion of the wheel il. Extending down end View of the switch mechanism mounted wardly from the lever-arm 2e and directly in the rear of the machine-frame; Fig. 4, a above the axis of the wheel is a projection detail view of a tripping-pin; Fig. 5, a front 25, contacting` with the upper surface of the 75 View of a portion of the switch mechanism plunger-head ll. The lever-arm 2i has also 25 with lever and plunger in released position, pivoted near its middle an upwardly-directed and Fig. 6 a longitudinal central section of a tripping-lever 26, whose pointed upper exbutton. tremity normally intersects the path ol' the Similar figures of reference indicate like dial tripping-pins. This tripping-leveris sup- 8o parts throughout the views. ported at its rear by a spring 2 A link 2S 3o In the drawings, l is the machine-frame, joins the free end of lever 24 to the outer end the top of which supports a clock 2. Proof a second lever 29, fulcrumed above the jecting from the face of the clock and acturst lever and near its middle on a stud 30. ated thereby is a spindle 8, upon which is The inner end ot' lever 29 carries a spring- 85 iixed a sleeve 4, carrying a double dial conactuated latch 3l, which engages a shoulder sisting ofafront member,indicatingtwenty- S2 upon the front ot the tripping-lever 2G. four hours, and a rear unmarked member 6, The outer end. oi' lever-arm 2st is normally both having around their'margins ninety-six drawn downward by a spiral spring 33, exholes, making a time interval between each tending from its extremity to a fastening 9o of fifteen minutes. These holes are vfor the acat the base of the frame. Extreme downward 4o commodation of two tripping-pins 7. (Shown travel of the lever-arm is checked by a lug in detail in Fig. 4t.) One end of the pin may 35 upon the frame l. Fixed by screws or be split, as shown. Projecting above the dial otherwise to the front of the frame is also a is a -lined pointer GO, which assists when it is stop 3G, situated slightly above the face of 95 desired to manually adjust the dial. wheel 9 and in the line of travel of the plun- Pivoted to the end of the main shaft S, ger-head ll, against which it normally abuts. which is mounted in the frame l, is a wheel The switching mechanism receives its prii), having holes radiating quadrentially from mary impulse from the main shaft 8, which the hub. In the lower portion of each hole projects beyond the frame of the machine, Ioo is a spiral spring 1l, upon which rests apluntraversing also a slate disk 37, and carries 5o ger 10, carrying a transverse stop-pin 12, lonupon its extremity a liber disk 3S, journaled gitudinally movable in a slot 13 in the arm of upon a squared brass bushing 39, with an inthe wheel. The plungerhead let is rectanguterior :flange 40, and held against horizontal displacement by a washer 4l and two nuts 42. The liber disk carries two contact-buttons 43 and 44, located diametrically opposite each other near its margin. These buttons consist of two pieces rivet-ed together, terminating in flanges 45, resting upon both sides of the disk, and the whole loosely incorporated in said disk. The slate disk 37 is screwed to the frame l, and let into its periphery at diametrically opposite points are four terminals 47, 48, 49, and 50. Two of these terminals 47 4S, diametrically opposite each other, carry copper spring-contacts 53. One only of these is shown in the drawings. Each has an inward bend G2 intermediate its length. rlhe terminals 49 and 50 are screwed into the shanks of two beveled contacts 5l and 52, located directly beneath the free ends of the spring-contacts 53. The rotation of the fiber disk carries the buttons 43 and 44 between the fixed and spring contacts, thus electrically connecting the legs of the circuit 54 and 55.

The operation of the mechanism is as follows: Vlhe tripping-pins '7 are inserted in the dial and its companion disk through the particular holes which indicate the times when it is desired that the circuit be closed and opened, respectively. The rotation of the dials 5 and t3 carries the pin into contact with the tripping-lever 2G, at which time the parts of the entire mechanism are in the position shown in Fig. l. The gradual pressure of the pin upon said lever finally forces the shoulder 32 from the latch 3l, thereby releasing levers 29 and 24, which, in response to the tension of spring 33, drop until stopped by the lug 35. This movement also forces the plunger-head 14, upon which the lever projection 25 rests, into a plane below the stop 36, thus allowing the wheel 9 to rotate one-quarter of a revolution. During this revolution the projection l5 in its advance contacts with the lower edge of lever-cam 16, gradually raising the latter, together with lever 29, again into locked position with the tripping-lever 26 preparatory to the impact ofthe second tripping-pin. A repetition of the rotatory movement described brings another of the plunger-heads into position beneath the lever projection 25. The described quarter-revolution of wheel 9 imparts, through the main shaft 8, a similar movement of the fiber disk 38, thus forcing the heads or fianges of buttons 43 and 44 between the spring-coa tacts 5l and 49, thereby connecting the breaks in the two legs 54 and 55, respectively, and completing the circuit. The second trippingpin 7 in its turn displaces the tripping-lever and allows another quarter-turn ot the main shaft 8, whereby the fiber disk is similarly rotated and the buttons removed from their positions between the contacts. The circuit is thus broken.

Having thus described my invention, what l claim as new, and desire to secure by Letters Patent, is-

l. In an automatic switch, the combination with a wheel of plungers mounted in the wheel and normally projecting beyond the face thereof, means for rotating said wheel, a lever-arm, pivotally mounted above the wheel, adapted to depress one of the plungers, a tripping-lever mounted upon the leverarm and means operated by a clock for tripping the tripping-lever.

2. In an automatic switch, the combination with a wheel of spring-actuated plungers mounted in the wheel, and normally projecting beyond the face thereof, a shaft for rotating said wheel, a lever-arm pivotally mounted above the wheel adapted to depress one of the plungers, a stop upon the machine-frame in the path of the projecting portion of the plunger, and means operated by a clock, for releasing the lever-arm.

3. In an automatic switch, the combination with a wheel, of spring-actuated plungers radially mounted in the wheel and normally projecting beyond the face thereof, a projection on the side of the wheel in advance ot' each plunger, acting on the wheel to rotate the same, a stop upon the machine-frame, a lever-arm pivotally mounted above the wheel adapted to depress one of the plunger-s, a lever-cam projecting downwardly from the lcver-arm, and normally within the path of the said projection, and means operated by a clock for releasing the lever-arm as described.

4. In an automatic switch, the combination with a wheel, of a spring-actuated plunger radially mounted in the wheel and normally projecting beyond the face thereof, a shaft for rotating said wheel, a stop upon the machine-frame in the path ot' the projecting portion of the plunger, a lever-arm pivotally mounted above the wheel adapted to depress one of the plungers, a spring upon the free end of the lever-arm exerting a downward tension thereon, and means operated by a clock for releasing the lever-arm.

5. In an automatic switch, the combination with a frame, of a lever-arm pivoted at one end to the frame, a second lever fulcrumed to the frame above the lever-arm, a link connecting the outer ends of lever and leverarm, a latch mounted in the free end of the lever, a tripping-lever pivoted to lever-arm, a shoulder on the tripping-lever for engagin with said latch, a revolving clock-dial actuated by clock mechanism, trippingpins, in the rotating dial adapted to contact with the tripping-lever, spring means for forcing the lever-arm downward, a wheel mounted below the lever-arm, and a spring-actuated plunger in said wheel adapted to receive the impact of the lever-arm upon release of the tripping-lever.

In testimony whereof l have allixed my signature in presence of two witnesses.

CLARENCE F. HEATH.

Vitnesses:

Honarro E. BnLLows, Crmnnns S. Ona.

TCO

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